refactor: remove get_displayable_items and displayable_items from XModule

openedx/core/djangoapps/xblock/runtime/shims.py

@@ -394,21 +394,3 @@ class XBlockShim:
         student when the module is created. This is deprecated and discouraged.
         """
         return False
-
-    def get_display_blocks(self):
-        """
-        Returns a list of descendent XBlock instances that will display
-        immediately inside this module.
-        """
-        warnings.warn("get_display_blocks() is deprecated.", DeprecationWarning, stacklevel=2)
-        blocks = []
-        for child in self.get_children():
-            blocks.append(child)
-        return blocks
-
-    def displayable_items(self):
-        """
-        Returns list of displayable modules contained by this XBlock. If this
-        module is visible, should return [self].
-        """
-        return [self]

xmodule/x_module.py

@@ -524,17 +524,6 @@ class XModuleMixin(XModuleFields, XBlock):
         not children of this module"""
         return []
 
-    def get_display_blocks(self):
-        """
-        Returns a list of descendent module instances that will display
-        immediately inside this module.
-        """
-        blocks = []
-        for child in self.get_children():
-            blocks.append(child)
-
-        return blocks
-
     def get_child_by(self, selector):
         """
         Return a child XBlock that matches the specified selector